508 DR. LINDSAY ON NEW-ZEALAND LICHENS. 
Sp. 3. S. FRAGILLIMA, Bab., var. lutescens, Krempelhuber. [Linds. Spermog. 198; Nyl. 
L. N. Z. 240.] 
1. Tarndale, Nelson, N. Z.: Dr. Sinclair: in my herbarium; sterile; one of the most 
graceful of the New-Zealand Stiete, characterized by its beautiful lemon-yellow colour, 
and its long, narrow, channelled, much-divided laciniæ. The colour is often dark brown 
about the base of the stem; and the thallus exhibits various shades of green, according 
to the degree of exposure to, or protection from, light. Sometimes it exhibits here and 
there various shades of red or brown, or it is variegated red and yellow. The upper 
surface of the thallus, especially towards the end of its segments, is sometimes roughened 
‘with a covering of minute granulations or isidioid tubercles, resembling those of the 
Usneæ. The margins and tips of the laciniæ are sometimes fringed with minutely 
lobulate proliferous growths, which frequently become long and ribbon-like. Occa- 
sionally there is patchy decortication of the thallus, or there are median and longitudinal 
fissures of the laciniæ. 
Gen. III. RicasozrA, De N. 
Sp. 1. R. coRIACEA, Hook. & Tayl. (Fig. 23.) [Sticta, Bab. L. N. Z. p. 19, plate 1254; 
Linds. Spermog. 204.] 
1. On trees, East Taeri bush, Otago: W. L. L.: in fruit, and spermogoniferous. 
Spores ellipsoid or fusiform, 1- to 3-septate, brown or olive, 0012" long, 00045” broad. 
Thece blue with iodine, 0036” to 0045” long, *0006" to 0009" broad. Paraphyses sub- 
discrete, very delicate and indistinct, not much exceeding in length the thecæ, united by 
very pale brownish-yellow tuberculiform heads. Hymenium in section one of the 
most beautiful to be found among the Sticte. "Thallus tomentose about its periphery 
and margins, covered with fine whitish hairs, which also copiously clothe the exciples of 
the apothecia, especially in their young, globose, unexpanded state. ; 
2. Auckland: Dr. Sinclair: in my herbarium; also in fruit. "Thallus and apothecia 
less tomentose than in Otago specimens ; characters otherwise the same. 
Sp.2. R. Montacner, Bab. [Nyl. L. N. Z. 248, Sticta; Bab. L. N. Z. 20.] 
. 1. On trunks and branches of dead trees (** Goai” and others), Greenisland and Saddle 
hill bush, Otago: W. L. L. : in fruit. A common corticolous form in the Dunedin dis 
trict of Otago. It resembles in general characters R. herbacea (fig. 24), having, like it, 
the aspect of a Parmelia. The thallus varies in colour from very pale buff to lurid (dark 
brown), and possesses the heavy disagreeable odour peculiar to so many of the Stiche. 
Sometimes its surface is rugose, and approaches the fossulate character of 5. pme 
Its margin, as well as the exciple of the apothecia, is sometimes covered with qn 
or squamulose growths. The cortical layer is sometimes eroded, exposing the subjao® 
medullary tissue. The spores and thecæ are exactly those of R. herbacea, to V 
B. Montagnei appears to me to be referable as a mere form. 
NEN 
